315688937 has 2 divisors, whose sum is σ = 315688938. Its totient is φ = 315688936.

The previous prime is 315688931. The next prime is 315688939. The reversal of 315688937 is 739886513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241367296 + 74321641 = 15536^2 + 8621^2 .

It is an emirp because it is prime and its reverse (739886513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315688937 - 2⁶ = 315688873 is a prime.

It is a super-3 number, since 3×315688937³ (a number of 26 digits) contains 333 as substring.

Together with 315688939, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315688931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157844468 + 157844469.

It is an arithmetic number, because the mean of its divisors is an integer number (157844469).

Almost surely, 2^315688937 is an apocalyptic number.

It is an amenable number.

315688937 is a deficient number, since it is larger than the sum of its proper divisors (1).

315688937 is an equidigital number, since it uses as much as digits as its factorization.

315688937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 315688937 is about 17767.6373499686. The cubic root of 315688937 is about 680.9048917587.

The spelling of 315688937 in words is "three hundred fifteen million, six hundred eighty-eight thousand, nine hundred thirty-seven".